Safety device.



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C. F. ROOT.

SAFETY DEVICE. APPLICATION FlLED APR.3. I914.

wi t/ammo jun) Patented Apr. 20, 1915.

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E CM 8 APPLICATION FILED APR-3.1914.

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all whom it may concern.-

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Be it known that T, CHARLES F. R001, a citizen of the United States ofAmerica, residing at Ravenna, in the county of Portage and State" ofOhio, have invented certain new and useful Improvements in SafetyDevices, of which the following is a specification.

This invention relates to certain new and 1 useful improvements insafety devices, and

relates more particularly to safety devices used in connection withstaying machines.

The object of the invention is to provide means to prevent the followeror head and anvil or die from contacting in cases where the hand of theoperator or any other obutruction may be interposed between said Iparts.

The invention in one form thereof comprises a ratchet bar attached tothe head of the press which carries the follower, and means to operate apawl so that the pawl will engage with the teeth of the bar and supportand lock the head against downward movement. In other words, when theawl becomes engaged with the teeth of the ar, it locks the head andprevents same from completing its stroke toward the anvll. When thistakes place, the rotation of the crank shaft is stopped or the belt thattransmits power to the crank shaft is thrown off,

, and as a result in case'the operators hand is interposed between thefollower and die and jaws of the anvil, the hand 1s not .crushed orinjured in any way since the head which carries the follower cannotcomplete its stroke but is supported and held by" the pawl againstdownward movement.

Tn the drawings: Figure 1 is a side elevation of an ordinary stayingmachine to which the invention is applied; Fig. 2 is a 41: that has acrank pin 5, to whicha link 6 'is attached at its upper end, the lowerend of the lihkheingattached to a stud 7 which,

Patented Apr. 1915.

Application filed April 3, 1914. Serial No. 829,236.

is secured to a head 8. lhe crank shaft 3 reclprocates the head 8 in theusual ways 9. A follower 10 is carried by the head and is adapted to bebrought in contact with the aws 11 and 12 of the anvil 13. The jaws 11and 12 have their upper portions taperedand conjointly form an invertedV-shape, and have their lower portions inclined as shown at 14 and 15.]The jaws are loosely fitted in a slot 16 and rest upon a plate 17, thatis of concavo-convex cross-section.

A groove 18 is formed in the side of the anvil and a shaft 19 is fittedin the groove so as to be capableof rotation therein. The shaft 19 isheld in place in groove 18 by the clips 20, 21 and 22, which clips havetheir free ends formed to conform to the shape of the shaft as depictedin Fig. 4. An enlarged groove 23 is formed in the anvil coaxial with thegroove formed for the journals of the shaft 19. Apertures 24 and 25 areprovided in the anvil and extend at right angles to the latter andcommunicate with the slots 16 by means of vertical apertures 26 and 27which lead up into the bottom of the slot 16 and communicate with theapertures 24: and 25. Arms 28 and 29 of L-shape are disposed within theapertures 24 and 25 and have the freeends of their vertical portionsprojecting through the apertures 26 and 27 to support the plate 17. Thearms 28 and 29 may be made integral with or secured to the shaft, asdesired.

A lever 30 having a boss 31 is secured to the shaft 19 by a feather key32 which permits the anvil to be slidably adjusted within the limits ofthe enlarged groove 23. The anvil is seated in-a head block 33 on itsfront end and is .supported at its rear end by av standard 34 which hasa cap 35 formed to fit over the anvil. It-will be apparent that theanvil can thus be longitudinally adjusted to accommodate itself to thefollower for boxes having different depths. Astandard 36 is fastened tothe bed of the machine .100

the lever 30 and its opposite end is pivotally connected to an arm 38which is secured to a shaft 40 that is journaled in the bracket bearings41 and 42. A rack bar 43 is secured to the top of the head 8, and hasits teeth engageable by a pawl 44 secured to the shaft 40 so that thetooth of thepawl is movement, partially rotate the shaft 40,

throwing the pawl 44' into contact with the teeth of the rack bar43. Thepawl 44 is normally held out of engagement with the rack bar 43 by aspring 45 which constantly exerts downward tension on the lever 30 tomaintain the pawl out of enga ement with the teeth of the rack bar. henthe follower is reciprocated to contact with the jaws 11 and 12, thejaws are forced down ward against the plate 17 which in turn is forcedagainst the ends of the arms 28 and 29 partially rotating the shaft 19and imparting an upward movement to the lever 30, link 37, and arm 38thereby moving the pawl 44 to engage with the teeth of the rack bar 43.If any obstruction, such as the operators hand or the like, isinterposed between the follower and the jaws 11 and 12, pressure will bebrought to bear upon the arms 28 and 29 of the shaft, forcing the pawlinto engagement with the teeth of the rack bar supporting it andpreventing it from making its stroke, and the belt which transmits powerto the crank shaft will thus be thrown off and the machine stopped.-

The weight of the lever 30 and its connections to the pawl, normallykeep the jaws 11 and 12 in their upward position as shown in Fig, 5, sothat when pressure is brought to bear upon the jawsll and 1.2 they areforced in a downward direction contactingwith the plate 1'? which isforced in contact with the end of the arms of the shaft 19, forcing itto rotate as described above for the purpose of throwing the pawl in andout of engagement with the rack bar.

In order to'provide for the operation of the machine in performing itsfunction of placing the stays on the boxes, the rack, bar 43 is made ofsuch a length that when the follower 10 is within, for instance, asixteenth of an inch, above the jaws 11 and 12, the rack will be belowthe tooth 46 of the pawl and when movement is imparted there to by thepressure of the follower upon the jaws, the lip instead of moving intoengagement with the rack bar 43 will move over the top of. the rack barwithout engagement therewith, thus permitting the follower and jaws ofthe anvil to be rigidly pressedtogether.

What i claimed is:

' 1. In combination with an anvil and a reeiprocatory head, arack bar.secured to the means to move the head and projecting upwardly thel'from,a pivoted pawl for engagement with the teeth of the rack, meansconnected to the pawl normally holding the pawl out of engagement withthe rack teeth, and means borne by the anvil for actuating saidconnecting pawl into engagement with the rackteeth to hold the headagainst movement, said anvil means being operable by the head engagingan object extraneous to the work and interposed between the head andanvil.

2. In combination with an anvil and a reciprocatory head, a rack barsecured to the head and projecting upwardly therefrom, a pivoted pawlfor engagement with the teeth of the rack, and means associated with theanvil and pawl whereby said pawl is moved the anvil the pawl will moveover the upper end-of the rack without engaging the latter.

3. In combination with an anvil and a reciprocatory head, a .lockingmember on the head, means to engage the locking member to hold the headagainst downward movement, and means carried bythe anvil and actuated byan object extraneous to the work andin the path of travel of the head toactuate the means which engage the locking member.

4. In combination with an anvil-and a reciprocatory head, a lockingmember on the head, means to engage the locking member to hold the headagainst downward movement, and means associated with the anvil and withthe means which engage the locking member to actuate the means whichengage the locking member, said means which engages the locking memberbeing movable past the same without engagement therewith upon contactof'the head with the work upon the anvil.

5. In combination with an anvil and a reciprocatory head, a jaw movab'lycarried by the anvil and normally projecting thereabove, a shaft carriedby the anvil, arms on the shaft engaging the jaw, a lever c011- -nectedto the shaft, a rack secured to the head and extending upwardlytherefrom, a

obstruction extraneous to the work is interposed between the head andanvil, said masses means, when the work on the. anvil and head contact,being moved past the lock with- 'out looking the lock.

reciprocating I extraneous to the work is interposed between thehead andanvil will engage the head and lock the same against downward movement.8/ In combination with a reciprocatory head and an anvil having amovable part thereon, a notched member connected. to the head andextending thereabove, mechanism to engage the notched member to lock thesame and the head against downward movement, and means operated by saidmovable part to effect movement of said mechanism.

' 9. In combination with a reciprocatory head and an anvil having amovable element associated with the working face thereof,

locg means for the head, means to operate the locking means from saidelement when an-object is interposed between the head and ele1nent,andmeans on the head to engage the locking means.

10; In combination with a reciprocatory head and an anvil having amovable element associated therewith, locking means for the head, meansto operate the locking means tromsaid element, and means'on the head toengage the locking means, when an obstruction extraneous to the work isinterposed between the head and element, and to enable the locking meansto move past said means 10H the head when the head and the Work on theanvil contact.

1-1. In combination with a reciprocating -work engaging head and ananvil, means associated with the head to lock the head against downwardmovement on its working stroke, and means associated with the anvilengageab'le with an object extraneous to the work and-interposed betweenthe head and anvil to actuate said locking means to looking positionupon'the interposition of the.

ob ect between the head and anvil and to 12. In combination with areciprocating I head and an anvil, means-to lock the head againstdownward movement on its workmg stroke and means forming a part of theworking face of the anvil for operating the locking means whereby whenan object extraneous to the work is interposed between,

the operating means and the head the operating means can move thelocking means to locking position.

13. In combination with a reciprocating head and an anvil, means to lookthe head against downward movement, depressible means forming a part ofthe working face o1 the anvil and actuatable by an object extraneous tothe work and interposed between same and the head to operate the lockingmeans and means. connecting the locking means to the depressible-meansto enable the latter to operate the locking means.

14-. In combination with a reciprocating head and an anvil, operatingmeans associated with the anvil, and locking means as sociated with the.head and connected to the operating means to lock the head againstdownward movement upon interposition of an object extraneous to the workbetween the anvil and head, said locking means allowing contactof thework on the anvil and CHARLES F. ROOT.

my signature Witnesses Jenn H. (loss, LELA RITCHIE.

